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A vertical solid steel post of diameter = 21and length = 2.90 is required to support a load of mass = 8300 . You can ignore the weight of the post. Take free fall acceleration to be . 1) What is the stress in the post? 2) What is the strain in the post? 3) What is the change in the post's length when the load is applied?
A rifle is aimed horizontally at a target 51m away. The bullet hits the target 2.0cm below the aim point. What was the bullet's speed as it left the barrel
A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. Find the his and her initial acceleration
In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth. How much work did Arfeuille do on the object
A stopping car comes to a skidding stop after 5 m. If the road exerts a force of 600 N opposite to the direction of the motion: how much work does the road do on the car
A cylinder contains a piston on each side of which is one kilomole of an ideal gas. The walls of the cylinder are diathermal, What is the change in the Helmholtz potential
When the gas in the tank is at room temperature, then what volume of gas can be compressed into the tank? The gas is measured at standard atmospheric pressure
You measure distances from the center of a diffraction pattern (y) to a series of dark fringes on a screen, What is the wavelength of the laser you used to collect the data
q1. a car owner uses wrench abc to loosen the lug nut at c. length of the handle ab is 372 mm and the owner applies
A 12.0-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.2 m/s, determine the rotational kinetic energy about its center of gravity
A 1m long cantilevered beam of rectangular cross section carries a uniform load of (w = 15 kN/m). The design specification calls for a 5-mm maximum deflection of the end of the beam. The beam is to be constructed of fir (E = 13 GPa). By analysis, det..
An electric car is being designed to have an average power output of 4,900 W for 2 h before needing to be recharged, How much energy would be stored in the charged batteries
In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. How fast must the rocket travel relative to earth
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